of anderson



March 29, 1932. s, JR 1,851,568

0 IRCUIT BREAKER LEVER Filed July 11. 1930 INVENTOR Marks Oauzs J-ATTORNEY fin Patented Mar. 29, 1932 r r I I 1,851,568

UNITED STATES PATENT OFFICE CHARLES I IALL DAVIS, JR., OF ANDERSON,INDIANA, ASSIGNOR 'lO DELGO-REMY CORPORATION, OF ANDERSON, INDIANA. ACORPORATION OF DELAWARE cmcorr BREAKER LnvER R E Application filed July11, 1930. Serial No. 467,254.

This invention relates to ignition appaplan views respectively of athird form of ratus and particularly to improvements in circuit breakerlever. circuit breakers and the operating parts With particularreference to the drawings, ther of, indicates a housing, whichin thepresent a One object of the inventionis to provide s e, y e a ti er cupsupporting a cira pivoted l ve havin lati l 111 cult breaker mountingplate 21, by cars 22 ertia of rotation so a to r vid i uit secured tothe housing with attaching screws breaker that is apable. of high speedpera- 23 OI other preferred dBViCES. Adjustably 7 ti mounted on theplate 21 is a bracket 24 pivm A f th bj t f h i ti i t otally movableabout a pivot post 25, through so vide a circuit breaker leverconstructed from the g y of all Qccehtllc screw 26 retallled a minimumnumber of parts. by the plate 21 with its head disposed in a A furtherobject of the invention is to pro- $1015 Q the bracket the bracket isvide a circuit breaker that is capable of manuheld 111 a(hushedP05113011 about h P facture from strip material, with the fewest 25 ymeans of p hg Screw 28 P j ibl number f Op'era tiong through a slot 29and being threaded in the A f th bj t f th i ti i t plate 21. The plate21 is centrally apertured vide means for securely retaining a pivot at Wp h of a m 31 hi i a i it b k l maintained in driving relation upon ashaft Further objects and advantages of the pressplhdle 2, as 13 theusual shructurea ent invention will b apparent f th f and such as 1sdes1red for the periodic operalowing description, reference being had tothe tlonpf a Cult h accompanying drawings wherein a preferred y l hgmounted on the embodiment of one form of the present in- P P 29 cllcultbreaker level ti i l l h w sembly 35 that is in cooperable engagement. Ith dr i with the rotatablecam 31 provided by the Fig. 1 is a plan viewof an ignition device shaft, and Pp i alternately p a including apreferred form of the instant inclose electrlcal cll'clhts 1- thedevlce, ventioh and to transmlt the circuit functions to a ter- Fig. 2is an enlarged View in side elevation mlnal P 36 Provlded by h hg In ofan improved circuit breaker lever assembly. the h f 0f h lhstaht l h iFig. 3 is a plan View f the assembly Seen the detalls thereof areillustrated in Figs. 1 in Fig 2. k to 8 nclusive, and are characterized1n that Fig. 4 is a transverse sectional view, sub- 01mm? h levelassembly stantially as illustrated by the line and arrows PnseS achfcult breaker hive? 37 Qal'rylhg a 35 f Fig r contact point 38 forcooperation with a fixed Fig. 5 is a transverse sectional view sub pomt33 on the/bracket rubbing blink sta-ntially as indicated by the line andarrows 39 cooperable Wlth h cam sl'for .actuatmg of Fig 2; V the lever37, and havlng a leaf spring at- Fio 6 and Fig 7 are detailed Viewq of atached thereto, which when secured within g block fmqming p of the(gircuit the housing 20 operates to oscillate the lever 37 with itspivot bushin 41 about the post 35 1 3 23 asselflbly m one of the 25whereby circuits are alternately opened and closed through the points 33and 38. 45 8 1S slde eleYatlohal VleW of a The lever 37 is formed orotherwise fabricuitbreak r level P gdated from a piece of stripmaterial, prefg 9 n 1 r slde elevatlcnal and pl n erably of steel orother hard metal to include views respectively of a modified form ofcira longitudinal fold or doubling over along cuit breaker lever. v themedial line to form a rigid back as at 42, 50 Figs. 11 and 12 are: sideelevational and and so as to provide contiguous laminations a means forattaching to the lever 37 the rubbing block 39 and one end of thecircuit breakrubbing block Nil 550i the rubbing er lever urging spring40, by illustratedin Figs. 3 and 4. At the pivoted end of the lever, thelaminations 43 and 44 are provided with sleeve-like flanges orextensions 50 and 51 adapted to receive and retain the pivot bushing 41hereinbefore, referred to, and which will be described in detailin'paragraphs that follow.

It will be observed in the form of the circuit breaker lever assemblyillustrated in Figs. 1 to 8, that the flanges 47 and 48, and theattached end of the spring 40 operates as clamping I embers betweenwhich one arm of the L-shaped rubbing block 39 is secured; and that therivets 49 pressing against the attached end of the spring 40 and againstthe flanges 47 and 48 operateas to clamp the spring and the flange tothe block 39. This assembly provides a compact grouping of the elementsofthe structure, verse dimensions are reduced to a minimum, enabling theuse of asmaller enclosing mechanism such as thecasing 20, or for anenlargement of such operating mechanism as the cam 31, and at the sametime avoiding crowding of other parts of the structurenecessary andincident to the device and usually enclosed within the casing 20.

. To accomplish this compact formation, the 39 isespecially formed as isillustrated in Figs. 6 and 7, and the operating spring 40 is especiallyformed as is illustrated in Fig. 8. In the instance of the rubbingblock, the attaching arm thereof is slit as at 55 to provide theparallel portions 56 and 57 that carry apertures 58 and provide for aclose coupling with the attaching flanges 47 and 48 as will presentlyappear. The spring 40 is slit as at 60 for a portion of its length alongits medial line so as to provide the substantially parallel extendingarms 61 and 62 provided with apertures 63. The slit block, as well asthe slit 60 of the spring, receive the body of the lever 37 therein, asillustrated so thatthe portions 56 and 57 of the rubbing block and thearms 61 and 62 of the spring may over-lay a portion' of the arm and maybe disposed behind the attaching flanges 47 and 48 respectively. Whenthe parts are thus disposed and proper- 1y aligned, they provide for thereception of the rivets 49 as' whereby thetrans the attaching rivets49-,as has been described and as is illustrated in Fig 4.

As has been illustrated, the spring 40, after its attachment to theflanges'47 and 48, bends outwardly and is in substance wrapped about thepivot portion-of the lever where it engages the sleeve-like flanges 50and 51 secured about the pivot bushing, and thence terminates in anattaching portion 64 for making mechanical and electrical connectionwith the terminal screw., 36 as earlier described. Aside from formingbearing portions for the spring 40, the flanges 50 and 51'operate toreceive a bushing 41 as earlier stated and also to firmly retain thebushing therein. When the bushing 41 is of dielectric material, then thelever 37 is well insulated The provi-' from its supporting structure.sions for the retention of the bushing within the aligned sleeves 50 and51 include peripheral grooves 65 and 66- about the bushing within whichare disposed the flanges 50 and 51 respectively after the bushing hasbeen assembled therewith. Flanges 50 and 51 are axially knurled on theirinner periphery before bushing 41 is pressed therein to prevent'bushingfrom rotating or oscillating with respect to flanges 50 and 51.The means of retention is fully illustrated in the transverse sectionalview of Fig. 5, and is accomplished by initially forming the flanges 50and 51 of cylindrical contour, and of suflicient size to allow thepassage of the bushing 41 therethrough. After the bushing 41 has beenproperly placed within the sleeve-like flanges, it is retained thereinby depressing the free edges-of the said flanges into the recesses 65and 66 by means of, a hollow tool or other instrument suitable for thepurpose. This causes the edges of the flanges to seat within the grooves65 and 66, and the knurls of the sleeves to bite into the body of thebushing and prevent relative rotation.

A second form of circuit breaker assembly is illustrated in Figs. 9andlO, and is essentially the same as the form just described in that-arigid lever portion 37a is formed by folding the blank the precedingform, and providing the free edges thereof with the lugs 45 and'46 forsupporting a contact 38, and the sleeve like flanges 50 and 51 formounting the pivot bushing 41. In the form illustrated in Figs. 9 and10, the blank of material is' extended assembly, is of molded-form 39aand provides ,along the back 42 as in However, the rubbing block illus-3711 retaining it an attaching portion 71 for disposition about orotherwise engaging the body of the lever thereon against movement in anydesired manner. In practice two countersinks are provided tosecure-moulded rubbing blocks on the arm, but apertures in the arm, orribs will answer the same purpose.

A third form of circuit breaker lever assembly is illustrated in Figs.11 and 12, and comprises essentially the same parts as illustrated inthe first form with the possible exception of the final formation of therubbing lockpreparing it for attachment to the attaching flanges. Whilethe plan view illustrated in Fig. 12, is in detail slightly different.in configuration from the form illustrated in Fig. 3, the lever member376 of the one form or the lever member 37 of the other formrespectively may be inter-changed with each of the parts associated withthe other without deviating from the invention herein disclosed. Theessential difference between these two forms being in the manner andorder of attaching the rubbing block and spring member to thelevermemben- In the third form illustrated the laminations 43b and 44bare provided with, the flanges e5, 46 for mounting-of the contact, theflanges {$7, 48

' to which are secured the spring and the rubbing block 396, and thesleeve-like flanges 50 and '51 within which is secured the pivot bushing41 as has been described in'each of the other formssubstantially as Therubbing block 39?) mounted upon the flanges 47, {18 need not be slitasin the instance of the first described form,'since the rubbing blockinthis instance; is secured to and 48, tirely between the operating cam 31and the attaching flanges carried by the lever. In this instance thespring 40 is slit as at and is assembled on the back side of theattaching flanges l7 and 48, being disposed in overlying relation withrespect to the arm 37?; described in the preferred form, retention ofthe rubbing, block and spring in firmrelation with the flanges 47 and 48being obtained by the rivets 49 as has been elsewhere described. Thisforms a circuit breaker lever assembly of greater transverse magnitudethan that the first form, and one that is adaptable tocertain forms ofconstruction that would the use of a form as illustrated in Figs. 1 to 8inclusive.

It will be observed by the above disclosure, that a circuit breakerlever assembly has been provided that is of light weight, that is ofrigid construction and that is easy of manufacture, requiring a minimumof constructional operations. The result is the production of a circuitbreaker lever assembly for high speed operation that is highly eflicientand that can be produced at relatively low with oppositely extending,integral located in the not necessitate cost. The pivot bushing issecurely retained within the arm in a manner that securely insulates thelever upon its supporting structure an properly spaces the sametherefrom.- The bushing cannot work loosefrom the arm and thiseleminates the wear usually attendant upon the portions of thisstructure that ordinarily give rise to inaccurate timing of ignition dueto lost-motion occurringfrom the wear. All of this produces quieteroperation and event of any fault arising in the lever assembly, theentire unit may be replaced with a new one operating in perfect order'atan inconsequental cost. lVhile the form of embodiment of the presentinvention as herein disclosed, constitutes a preferred form, it otherforms might be adopted, all coming within the scope of the claims whichfollow.

lVhat is claimed is as follows:

higher speed operation. In the is to be understood that l. A circuitbreaker lever comprising, in

comprising, in plates located axis of oscillathe lever and providedrespectively flanges same plane parallel to the axis of the lever, arubbing block secured to both attaching flanges 4L flanges, a bearingcarried by the plates, and

a contact secured to both plates.

circuit breaker lever comprising, in

combination, two juxtaposed plates located in planes at right anglestothe axis of oscillation of the lever and provided respectively withoppositely extending, integral flanges located in the same planeparallelto' the axis of the lever, a rubbing block secured flanges, abearing carried by the plates, and a contact secured to both plates.

4. A circuit breaker lever comprising, in

combination, two juxtaposed plateslocated inplanes at right angles tothe axis of oscillation of the lever and provided respectively withoppositely extending, integral flanges located in the same planeparallel to the axis of the lever and provided respectively withopositely extending integral annular flanges surrounding aligned holes,a bushing retained within both annular flanges, a rubbing block securedto both plates, a contact secured to both plane flanges of the plates,and a rubbing block secured to the plates.

5. A circuit breaker lever comprising, in combination, two juxtaposedplates located in planes at right angles to the axis of oscillato both aleaf spring secured to both flanges,

tion

flanges, each pair of flanges being in a plane parallel to the axis ofthe lever, a rubbing block secured to one pair of said flanges, acontact secured to an other pair of said flanges, and a bearing carriedby said plates. 7

6. A circuit breakerlever comprising, in combination, two juxtaposedplates located in planes at right angles to the axis of oscillation ofthe lever andprovided respectively with pairs of oppositely extending,integral flanges, each pair of flanges being in a plane parallel to theaxis of thelever, and provided respectively with opposltely extending,integral annular flanges surrounding aligned holes, a bushing retainedwithin both annular flanges, a rubbing block secured to one pair ofplane flanges, and a contact secured to another pair of plane flanges.

7. In an ignition device, a circuit breaker lever formed from stripmaterial to provide 'a contact supporting lever of laminated form,flanges providedat one end of said lever and supporting a contact point,means intermediate the ends of said lever and a rubbing block securedthereto, sleeve like flanges disposed at the other end of said le-.ver,.a bushing disposed therein, said bushing providing recessesreceiving said flanges, and means for urging the lever for rotationabout the axis of the bushing.

8. In an ignition device, a circuit breaker lever formed from stripmaterial to provide a contact supporting lever of laminated form, acontact, a rubbing block and a leaf spring secured to said lever, andoppositely extending sleeve-like flanges coaxially disposed near one endof said lever, and a bushing secured within the sleeve-like members withthe terminating edges of said sleeves received by annular groovesprovided by said bushing.

9. In an ignition device, a circuit breaker lever therefor, comprisingin combination, sleeve-like flanges provided at one end thereof, abushing disposed within saidlflanges recesses, the terminating andprovided with edge of said flanges being depressed into said recessesfor securing the bushing to the lever.

10. A laminated circuit breaker lever comprising in combination, a pairof contiguous laminations carrying'right and left hand" flangesrespectivelyfsaid laminations being secured together sets or pairs, saidlever'providing apair of flanges at each end thereof and a third pairintermediate its ends, a contact point secured to the flanges at onepivot bushing secured to the flanges at the opposite end thereof, arubbing block and a leaf spring both secured to the intermediate pair ofsaid flanges.

l 11. A circuit breaker lever comprising a single sheet metal stampingshaped so as to of the lever and provided respectively with pairs ofoppositely extending, integral of-flanges being in a end of the leverand a provide two juxtaposed plates located in planes at right angles tothe axis of oscillation of-the lever and provided, respectively, withoppositely extending, integral, annular flanges surrounding alignedholes, a bushing retained within both annular flanges,a rubbing blocksecured to both plates, and a contact secured to both plates.

12. circuit breaker lever comprising a single sheet metal stampingshaped so as to provide two juxtaposed plates located in planes at rightangles to the axis of oscillation of the lever and provided,respectively, with oppositely extending, integral, annular flangessurrounding aligned holes, and shaped so as to provlde a leaf springportion integral with said plates, a bushing retained within bothannular flanges, a rubbing block secured to both plates, and a contactsecured to both plates.

13. A circuit breakerlever comprising a metal stamping shaped so as toprovide two juxtaposed plates located in planes at right angles to theaxis of oscillation of the lever and-provided,respectively, withoppositely extending, integral, annular flanges surrounding alignedholes, and shaped so as to provide oppositely extending,

single sheet integral flanges located in the same plane,

parallel to the axis of the lever, a bushing retained within bothannular flanges, a rubbing block secured to both plane flanges, and acontact secured to both plates.

14. A- circuit breaker single sheet metal stamping shaped so as toprovide two juxtaposed plates located in planes at right angles to theaxis of oscillation of the lever and provided, respectively, withoppositely extending, integral, annular flanges v surrounding alignedholes, and shaped so as to provide two pairs of oppositely extending,integral flanges, each pair plane at right angles to lever comprising athe axis of the lever, a bushing retained within both annular flanges, arubbing block secured to one pair of plane flanges, and a contactsecured to the other pair of plane flanges. y v

In testimony whereof I hereto afiix my signature.

:CHARLES HALLDAVIS, Ju. I

to present the flanges in

